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# Triple integration by parts... watch

1. Just as the title reads... could someone remind me of the triple integration by parts formula please... it's in order to find a reduction formula for some stupid integral with 3 terms in it... thanks
2. Err... An example might help. I don't recall ever having to do a triple by parts but i maybe wrong.
3. (Original post by insparato)
Err... An example might help. I don't recall ever having to do a triple by parts but i maybe wrong.
Yea, especially not for a reduction formular question
4. Well basically it's just the same as the normal integration by parts only with 3 terms in it.. like I'm trying to find the reduction formula for
In = integral from 1 to 0 of e^sinx cosxsin^nx don't know if this format is clear enough
5. the term, e^sinx cosx can be integrated, by recognition.
6. Think about the integral of (cos(x)).(e^(sin(x))).
7. oh ****kkkkk yeah, ok prob. solvd. cheers... stupid question though
8. I cannot ever recall it coming up at A-level, but it is simple to see where a "triple IBP" may come from. The normal integration by parts comes from the product rule, so a "triple IBP" would come from the product rule for the product of three functions. ()
9. I've solved that thing already but thanks anyways

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Updated: March 13, 2008
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